CNN Senior International Correspondent Nic Robertson and a team of CNN journalists spent a year tracking down the details of Bryant Neal Vinas, and why the former altar boy turned to terrorism. Watch a clip of the documentary "American Al Qaeda."

Bryant Vinas' life

Analysis

U.S. counterterrorism officials say homegrown terrorism is on the rise. In the last year, more than a dozen Americans have been accused of having links to Islamist terrorism, including Vinas. That represents a major change since September 11, 2001, according to analysts. FULL STORY